Black Friday sales officially start Friday, November 28, and run through Cyber Monday, December 1, and Lifehacker is sharing the best sales based on product reviews, comparisons, and price-tracking ...

Skip the messy guesswork, these clever, no-crack egg tests instantly reveal freshness using water, light, sound and even a quick spin. Simple, fun and surprisingly accurate, they help you avoid ...

Physicists once treated Einstein’s picture of a clockwork universe as the gold standard for what “reality” should look like, ...